Sturdy snow blower models for contractor use. The basic structure of these snow blowers has been in production since 2002, but their details have improved over time, in collaboration with their operators. The AT 251 is a direct-drive snow blower model, fitted with 8 swinging feed platforms, as well as a stationary throwing impeller. The model with the stationary impeller is clearly the most fuel-economical model. The AT 251 V has the same technical characteristics, but it is fitted with the sturdy domestic Peurala reduction gear. This gear is the most reliable gear model used on the domestic snow blower market.